#include<stdio.h>
#include"head.h"
int main(void){ 
  int a,b,i;
  printf("enter two numbers:");
  scanf("%d %d",&a,&b);
  for(i=0;i<=5226;i++){
}
  printf("add:%d\n",add(a,b));
  printf("sub:%d\n",sub(a,b));
  printf("mul:%d\n",mul(a,b));
  printf("div:%lf\n",div(a,b));

  return 0;
}
